About IR35 Calculator
Understanding IR35 and how our calculator helps you make informed decisions.
What is IR35?
IR35 is UK tax legislation designed to determine whether a contractor should be treated as an employee for tax purposes. It affects freelancers and contractors who work through their own limited companies or personal service companies.
The rules help determine whether you're genuinely operating as a business or if you're essentially an employee in disguise. This affects how much tax and National Insurance you'll pay.
How Our Calculator Works
Our IR35 calculator provides accurate estimates for both Inside and Outside IR35 scenarios:
- Inside IR35: Calculates umbrella company deductions, PAYE tax, and take-home pay
- Outside IR35: Determines optimal salary/dividend splits, corporation tax, and personal tax liabilities
- Tax Year Context: Accounts for existing income to provide accurate marginal tax calculations
- Personal Circumstances: Includes student loans, child benefit, pension contributions, and allowances
Key Features
Comprehensive Calculations
Accounts for all major tax components including income tax, National Insurance, corporation tax, and dividend tax.
Current Tax Rates
Uses tax-year-specific rates, thresholds, and allowances, including the latest 2026-27 rules.
Personal Circumstances
Factors in your specific situation including existing income, family circumstances, and financial obligations.
Detailed Breakdown
Provides transparent calculations showing exactly how your take-home pay is calculated.
Ready to Calculate Your IR35 Position?
Use our calculator to get an accurate estimate of your take-home pay under different IR35 scenarios.
Start Your Calculation